Blasting cartridge



Oct. 31, 1944. R. J. GOULET 2,361,622

BLASTING CARTRIDGE Filed Nov. 16, 1940 REAL J. GOULET INVENTOR.

ATTORNEY.

Patented Oct. 31, 1944 BLASTIN G CARTRIDGE Real, J. Goulet, Benton Station, Calif., assignor of one-half to Coulter W. Jones, Benton Station,

. Calif.

Application November 16,1940, Serial No.365,927

1 Claimf (01. 102-24 This invention relates to blasting cartridges, such as nitroglycerin-containing cartridges or powder-containing cartridges, provided with an integral tie member positioned for attachment of a. fuse in the preparation of primers.

One of the particular objects of the invention is to provide a blasting cartridge provided with an integral tie member positioned to be used to secure a fuse in fixed relation to the cartridge, whereby the preparation of primers is rendered more safe and convenient.

Primers are conventionally prepared by taking a stick or cartridge of blasting powder or the like, forcing an opening into the cartridge and inserting into this opening a capped fuse. It will be appreciated that in order that the capped end of the fuse be securely kept in place within the cartridge, it is necessary to render the fuse substantially immobile with respect to the cartridge, and until recent times the conventional practice has been that of making a transversely extending hole ear one end of the cartridge and another hole extending at an angle into the interior of the cartridge, threading the capped fuse through the first transverse hole and bending the capped end over and into the second-mentioned hole. This procedure results in the production of a sharp bend in the fuse at the position of the transverse hole, which is very dangerous inasmuch as the fuse may go out at that point or, still worse, burn very slowly from that point on, so that when the miners enter the zone in which a blasting operation has been conducted the delayed explosion of the slow-burning primer will take place, with disastrous results. This form of lacing is now forbidden in most mining districts, as is the practice of tying the fuse about the cartridge through the use of a half-hitch or the like.

According to the present invention I provide a blasting cartridgehavin a suitable tie member integrally secured thereto, such tie member being laced, threaded, adhesively secured, or attached in any other desired manner to the wrapper customarily employed for the cartridge. This tie member is preferably of suflicient length that the free ends thereof are available to wrap several tridge to which a tie member has been attached according to this invention;

Fig. 2 is a corresponding view showing the tie member as used to secure a fuse in place upon the cartridge, to form a primer; and

Fig. 3 is a partly broken-away View of one end of the blasting cartridge provided with an integral tie member according to this invention, said tie member being secured in place through the agency.

of a deformable coating of wax or like material.

Referring particularly to Figs. 1 and 2, a blasting cartridge is indicated generally at I, provided with a wrapping indicated at 2. Two spaced longitudinal slits 3a and 3b are provided in the side wall and near one end of the cartridge, through which a flexible tie member such as a string, tape, ribbo wire band, or the like, is threaded, as at 4. Referring particularly to Fig. 2, the tie member of the present invention is utilized in the following manner. A diagonally extending hole 5 is made in the cartridge stick through the agency of the conventional awl-like implement, and a fuse 6 carrying a detonating cap I is inserted into this hole 5. The fuse 6 is laid against the side wall of the cartridge l, and the tie member 4 is then wrapped about the cartridge and the fuse 6, preferably several turns as at B, and the ends of the tie member are securely tied together as shown at 9. This arrangement disposes the fuse securely along the side wall of the cartridge, without causing any constrictions or other interference with the normal shape or function of the fuse, as is clearly shown in Fig. 2.

Referring particularly to Fig. 3, I have shown a cartridge ll provided with a wrapping l2, a loop member l6 near one end of the cartridge formed in the wrapper through the agency of longitudinal slits l3a and l3b as above described, and a tie member l4 disposed within said loop. One end Ma of the tie member is shown as wrapped in a counterclockwise fashion toward the other end of the cartridge, and the other end Mb is wrapped in a clockwise fashion over the end [4a. The right-hand end of the stick is then dipped in a wax or comparable deformable material to form a superficial coating I5, leaving the outer end of the string ends I la and lib exposed. When the cartridge shown in Fig. 3 is to be used in the formation of a primer, the string ends bib and Ma are successively unwrapped from the cartridge, tearing through the wax coating, and the capped fuse applied and secured in place after the manner described in connection with Fig. 2.

It will be appreciated that while I have shown the string or other tie member secured in place through the agency of the loop member I6, the string may be extended through any desired opening in the wrapper, and carried one or more times about the stick underneath the wrapper, if desired, to more effectively secure the memher in place. Similarly, the tie member may be attached adhesively, if desired, without departing from the scope or spirit of this invention.

Blasting cartridges usually come packed in boxes containing some one hundred or more cartridges, a third or so of which would be used" ordinarily as primers, and I therefore propose to provide the integral tie members of this invention for approximately one-third of the sticks in the box so that any given box of powder will be provided with ready-made cartridges adapted to be used as primers. that these primers are usually made up in the field, so that safe transportation to the site at whichthey will be used may be had. In order to identify the cartridges that are provided with the integral tie members, I may color such tie members a distinctive color, such as red, or in the case of the form shown in Fig. 3 the wax coating l5 may be dyed red or some other suitable color so that selection and utilization of It Will be appreciatedthe proper cartridges will be made by the user, and the preparation of primers thus facilitated. Having now described and illustrated a par:

ticular form of my invention, I wish it to be understood that my invention is not to be limited to the specific form, or arrangement of parts herein described and shown, or specifically covered by my claims.

I claim: 7

A blasting cartridge adapted for attachment of a fuse thereto in preparation for use as a primer which comprises: an elongated cartridge ri'fember'provided along a side thereof adjacent one end with a flexible tie member secured thereto, said tie member being of such length as to wrap about such cartridge a plurality of times whereby a fuse may be secured to the side wall of such cartridge through the use of such tie member, and said tie member being wrapped about said cartridge and the turns thereof being held in: place against said cartridge through the agency of asuperficiallyapplied coating of deformabl'e material such as wax or the like and the" outer ends thereof being free for engagement by the user.-

REAL J. GOULET. 

